Kirkland Signature Ultra Clean HE Liquid Laundry Detergent

This is a heavy-duty liquid laundry detergent formulated with an advanced multi-surfactant and triple-enzyme system alongside a rich, complex fragrance profile.

Performance Rating: 9.3

The formula achieves an exceptional cleaning rating due to its comprehensive and robust formulation. A potent multi-surfactant system combining Sodium Laureth Sulfate, Sodium C10-16 Alkylbenzenesulfonate, and ethoxylated alcohols ensures superior emulsification of greasy soils and heavy dirt. The performance is further elevated by a targeted multi-enzyme cocktail consisting of Protease, Amylase, and Mannanase, which efficiently breaks down protein, starch, and complex food stains. Additionally, Polyethyleneimine Ethoxylate and Modified Polycarboxylates act as advanced anti-redeposition agents, while Tetrasodium Iminodisuccinate and Disodium Distyrylbiphenyl Disulfonate provide effective water softening and long-lasting fabric brightening.

Safety Rating: 4.8

The safety rating reflects significant concerns regarding skin sensitization, toxicity, and environmental impact. The formulation relies on highly sensitizing preservatives, specifically Methylchloroisothiazolinone (CMIT), Methylisothiazolinone (MIT), and 2-Bromo-2-nitropropane-1,3-diol, a known formaldehyde releaser. Furthermore, the fragrance blend contains Butylphenyl Methylpropional (Lilial), recognized for reproductive toxicity risks, alongside persistent environmental hazards like Hexamethylindanopyran (Galaxolide). An extensive array of declared fragrance allergens—including Limonene, Linalool, Hexyl Cinnamal, and Coumarin—coupled with strong anionic surfactants, elevates the likelihood of allergic contact dermatitis and respiratory or ocular irritation.

Final Rating: 7.2

The final rating represents a compromise between outstanding cleaning capability and notable chemical safety liabilities. On one hand, the detergent delivers professional-grade stain removal, fabric care, and whitening through its balanced synergy of anionic surfactants, specialized enzymes, and high-efficiency polymers. On the other hand, the inclusion of aggressive isothiazolinone preservatives, formaldehyde-releasing compounds, Lilial, and multiple known allergens significantly depresses its health and ecological profile. The resulting rating reflects a product engineered for heavy-duty laundry performance that falls short in consumer safety, ingredient mildness, and environmental sustainability standards.

Verdict

This liquid laundry detergent delivers exceptional stain-fighting power through a robust combination of anionic and non-ionic surfactants, including Sodium Laureth Sulfate, ethoxylated alcohols, and alkylbenzenesulfonates. These work synergistically to lift stubborn grease, oil, and everyday grime. The formula is further reinforced by a targeted triple-enzyme blend featuring Protease, Amylase, and Mannanase, which efficiently degrade protein-based stains, starches, and food gums. Together with Polyethyleneimine Ethoxylate and modified polycarboxylates, the detergent prevents loosened soil from redepositing onto fabrics during the wash cycle.

In addition to strong soil removal, the formula incorporates high-performance builders and brighteners to maintain fabric appearance. Tetrasodium Iminodisuccinate and Sodium Citrate act as effective chelating agents that soften hard water and boost surfactant efficiency, preventing mineral buildup. The inclusion of Disodium Distyrylbiphenyl Disulfonate, a high-efficiency optical brightener, visually enhances the whiteness and vibrance of light-colored garments. Meanwhile, stabilizing agents such as Propylene Glycol and Calcium Chloride ensure that the enzymatic components remain active and potent throughout the product’s shelf life.

The detergent features an unusually intricate and long-lasting fragrance architecture comprising floral, woody, and citrus notes. Fragrance fixatives and aromatic compounds like Hexamethylindanopyran, Alpha-Isomethyl Ionone, Limonene, Linalool, and Patchouli Oil work together to leave freshly washed laundry with an enduring, premium scent. This complex olfactory profile provides a noticeable burst of freshness that persists through the drying cycle and extended closet storage, making it particularly appealing for consumers who prefer heavily scented laundry.

Despite its impressive cleaning capability, the formula contains several potential sensitizers and harsh preservatives that warrant caution. The preservation system relies on Methylchloroisothiazolinone (MCI), Methylisothiazolinone (MI), and Bronopol, which are recognized contact allergens that can trigger dermatitis. Coupled with a dense array of fragrance allergens such as Benzyl Salicylate and Coumarin, this detergent is poorly suited for individuals with reactive skin, allergies, or eczema, as well as for laundering baby clothing.

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Ingredient Evaluation

📁 Surfactants / 表面活性剂

🧪 Alcohols, C12-15, Ethoxylated / C12-15 烷醇聚醚

Purpose: Non-ionic surfactant that helps break down and remove oily and greasy soils.

Notes: Commonly used in liquid laundry detergents for effective grease cutting at lower wash temperatures.

🧪 Sodium Laureth Sulfate / 月桂醇聚醚硫酸酯钠

Purpose: Primary anionic surfactant that provides detergency and rich foaming action.

Concerns: May cause skin irritation at high concentrations, though typically well-tolerated in laundry use after rinsing.

Notes: Widely used for its balanced foaming and effective soil removal profile.

🧪 Benzenesulfonic Acid, C10-16-Alkyl Derivs., Compds. with Triethanolamine / C10-16 烷基苯磺酸三乙醇胺盐

Purpose: Anionic surfactant that enhances soil removal and liquid formulation stability.

Notes: Triethanolamine salt form is typically more soluble in liquid concentrates compared to sodium LAS.

🧪 Sodium C10-16 Alkylbenzenesulfonate / C10-16 烷基苯磺酸钠

Purpose: Core anionic surfactant providing high detergency against particulate and oily soils.

Concerns: Can cause skin dryness or irritation upon direct, prolonged contact with the undiluted product.

Notes: One of the most cost-effective and widely used primary cleaning surfactants in detergent manufacturing.

🧪 Sodium Cocoate / 椰油酸钠

Purpose: Natural fatty acid soap acting as a surfactant and foam regulator.

Notes: Acts as an in-situ defoamer in washing machines while assisting with dirt dispersion.

🧪 Benzene, C10-13-Alkyl Derivs. / C10-13 烷基苯

Purpose: Surfactant precursor residue or processing carrier aiding active ingredient solubility.

Notes: Typically present as trace unreacted feed material or carrier intermediate in linear alkylbenzene sulfonate blends.

📁 Solvents / 溶剂

🧪 Water / 水

Purpose: Primary liquid carrier and solvent dissolving active ingredients.

Notes: Typically deionized or softened water to prevent interfering minerals from reducing surfactant performance.

🧪 Alcohol / 乙醇

Purpose: Viscosity regulator, solvent, and low-temperature stabilization agent.

Notes: Helps maintain product clarity and prevents phase separation or freezing in cold storage.

🧪 Propylene Glycol / 丙二醇

Purpose: Co-solvent, humectant, and enzyme stabilization carrier.

Notes: Plays a dual role by improving liquid pourability and preserving enzymatic activity during shelf life.

🧪 Dipropylene Glycol / 二丙二醇

Purpose: Fragrance carrier and formulation solubilizer.

Notes: Often introduced as a diluent and fixative in fragrance raw material blends.

📁 Chelating Agents / 螯合剂

🧪 Sodium Citrate / 柠檬酸钠

Purpose: Water softener, detergent builder, and pH buffer.

Notes: Readily biodegradable alternative to traditional phosphate and phosphonate builders.

🧪 Tetrasodium Iminodisuccinate / 亚氨基二琥珀酸四钠

Purpose: Biodegradable complexing and chelating agent that sequesters hard water ions (Ca2+, Mg2+).

Notes: Modern eco-friendly substitute for EDTA and NTA with excellent environmental compatibility.

📁 Active Ingredients / 活性添加剂

🧪 Polyethyleneimine Ethoxylate / 乙氧基化聚乙烯亚胺

Purpose: Anti-redeposition polymer and soil-release booster targeting hydrophobic stains.

Notes: Prevents removed dirt from settling back onto fabrics during the wash cycle, especially on synthetic fibers.

🧪 Modified Polycarboxylate / 改性聚羧酸盐

Purpose: Dispersant and anti-encrustation agent preventing inorganic salt buildup on textiles.

Notes: Maintains wash liquor clarity and prevents fabric greying over repeated wash cycles.

🧪 Disodium Distyrylbiphenyl Disulfonate / 二苯乙烯联苯二磺酸二钠

Purpose: Optical brightener that absorbs ultraviolet light and emits visible blue fluorescence.

Notes: Highly effective at low temperatures and resistant to chlorine bleach fading.

🧪 Colorant / 着色剂

Purpose: Provides visual appeal and product aesthetic differentiation.

Notes: Water-soluble dye formulated to wash out completely without staining laundry.

📁 Enzymes / 生物酶制剂

🧪 Protease / 蛋白酶

Purpose: Catalyzes the breakdown of protein-based stains such as blood, egg, grass, and sweat.

Notes: One of the primary enzymes utilized in premium heavy-duty liquid laundry detergents.

🧪 Amylase / 淀粉酶

Purpose: Breaks down starch-based stains from foods like pasta, gravy, potatoes, and chocolate.

Notes: Synergizes with surfactants to remove gelatinized food residues from fabric weaves.

🧪 Mannanase / 甘露聚糖酶

Purpose: Degrades difficult guar and locust bean gum stains commonly found in processed foods and cosmetics.

Notes: Targets stubborn thickener and binder residues that trap dirt particles in textile fibers.

🧪 Calcium Chloride / 氯化钙

Purpose: Enzyme stabilizer providing essential calcium ions.

Notes: Maintains the structural integrity and catalytic activity of protease and amylase enzymes in aqueous liquid bases.

📁 Preservatives / 防腐剂

🧪 2-Bromo-2-Nitropropane-1,3-Diol / 2-溴-2-硝基-1,3-丙二醇 (布罗波尔)

Purpose: Broad-spectrum antibacterial preservative protecting the aqueous formula.

Concerns: Formaldehyde-releasing preservative; can release minor levels of formaldehyde over time and may irritate sensitized skin.

Notes: Highly effective against Gram-negative bacteria such as Pseudomonas species.

🧪 Methylchloroisothiazolinone / 甲基氯异噻唑啉酮

Purpose: Broad-spectrum antimicrobial preservative inhibiting bacterial and fungal growth.

Concerns: Known contact allergen; regulated strictly in concentration levels.

Notes: Usually blended with Methylisothiazolinone in a fixed 3:1 ratio (CMIT/MIT mixture).

🧪 Methylisothiazolinone / 甲基异噻唑啉酮

Purpose: Preservative preventing fungal and microbial spoilage in aqueous solutions.

Concerns: Recognized skin sensitizer, regulated to low parts-per-million levels in household products.

Notes: Used at very low concentrations to ensure safe laundry use upon rinsing.

📁 Fragrance / 香精

🧪 Fragrance / 香精

Purpose: Provides clean scent and masks raw chemical odors.

Concerns: Proprietary fragrance mixtures may trigger sensitivities in individuals prone to fragrance allergies.

Notes: Complex mixture of synthetic and botanical aroma chemicals formulated for laundry freshness.

🧪 Hexyl Cinnamal / 己基肉桂醛

Purpose: Fragrance ingredient providing a floral, jasmine-like scent.

Concerns: Listed cosmetic allergen requiring labeling in several regulatory jurisdictions.

Notes: Common mid-note in floral household fragrances.

🧪 Cyclamen Aldehyde / 仙客来醛

Purpose: Synthetic fragrance compound imparting a fresh, floral cyclamen and lily scent.

Notes: Offers high substantivity on wet and dry laundry.

🧪 2-Cyclohexyl-2-Cyclohexylidene Acetonitrile / 2-环己基-2-环己亚基乙腈 (牡丹腈)

Purpose: Aroma compound providing a tenacious floral, peony, and geranium-like note.

Notes: Known in the perfumery industry as Peonile; provides excellent chemical stability in alkaline detergent systems.

🧪 Gamma-Undecalactone / γ-十一内酯 (桃醛)

Purpose: Flavor and fragrance compound imparting a fruity, peach-like aroma.

Notes: Lactone commonly used to introduce warm, fruity undertones.

🧪 Benzyl Salicylate / 水杨酸苄酯

Purpose: Fragrance fixative with a mild sweet, floral-balsamic scent.

Concerns: Known fragrance allergen.

Notes: Acts as an effective fixative to help other scent compounds adhere longer to washed fabrics.

🧪 Hexamethylindanopyran / 佳乐麝香

Purpose: Synthetic polycyclic musk fragrance fixative imparting long-lasting clean musk notes.

Concerns: Exhibits persistence and bioaccumulation potential in aquatic environments.

Notes: Widely known under the trade name Galaxolide, prized for high laundry substantivity.

🧪 Anisaldehyde / 茴香醛

Purpose: Fragrance compound providing a sweet, spicy, hawthorn and anise note.

Notes: Naturally found in aniseed and widely synthesized for cosmetic and detergent perfumery.

🧪 Alpha-Isomethyl Ionone / α-异甲基紫罗兰酮

Purpose: Fragrance ingredient imparting powdery, floral, violet, and woody notes.

Concerns: Recognized fragrance allergen.

Notes: Commonly used in premium fabric care scents to impart a sophisticated powdery finish.

🧪 Methyl Anthranilate / 邻氨基苯甲酸甲酯

Purpose: Fragrance ingredient imparting sweet, fruity, orange-blossom and grape-like notes.

Notes: Can form Schiff bases with aldehydes in fragrance compositions.

🧪 Benzyl Acetate / 乙酸苄酯

Purpose: Fragrance compound providing a fresh, rich jasmine and gardenia floral aroma.

Notes: Primary constituent of natural jasmine and ylang-ylang oils.

🧪 Ionone / 紫罗兰酮

Purpose: Aroma compound providing classic floral violet, cedarwood, and berry notes.

Notes: Derived from citral; classic building block of floral perfumes.

🧪 Benzyl Acetone / 苄基丙酮

Purpose: Fragrance component offering sweet, floral, and woody undertones.

Notes: Naturally occurring in cocoa and tobacco; imparts depth to laundry scent formulations.

🧪 Acetylcedrene / 乙酰基柏木烯 (甲基柏木酮)

Purpose: Woody-amber fragrance component and fixative.

Notes: Commonly marketed under trade names such as Vertofix or Lignofix.

🧪 Tetramethyl Acetyloctahydronaphthalenes / 四甲基乙酰基八氢萘 (龙涎酮)

Purpose: Woody, amber, and velvet fragrance enhancer and long-lasting fixative.

Concerns: Can cause skin sensitization in concentrated forms.

Notes: Commonly known as Iso E Super; famous for its high diffusion and lingering fabric adherence.

🧪 3a,4,5,6,7,7a-Hexahydro-4,7-Methano-1H-Inden-5(or 6)-yl Acetate / 乙酸三环癸烯酯 (乙酸二环戊烯酯)

Purpose: Aroma ingredient providing crisp herbal, green, and fruity-floral notes.

Notes: Commonly known as Verdyl Acetate or Florocyclene; highly stable in detergent media.

🧪 Delta-Damascone / δ-突厥酮

Purpose: Potent fragrance component imparting rich rose, apple, and blackcurrant notes.

Concerns: Potential skin sensitizer at elevated concentrations; strictly dosed in finished formulations.

Notes: Has an extremely low odor threshold, providing high scent impact at trace amounts.

🧪 Octahydro-Tetramethyl-Methano-1-Naphthol / 八氢四甲基甲桥萘酚 (柏木醇衍生物)

Purpose: Woody-ambery aroma fixative compound.

Notes: Imparts substantive woody-amber dry-down notes to laundered textiles.

🧪 Limonene / 柠檬烯

Purpose: Fragrance ingredient providing a fresh, uplifting citrus and orange aroma.

Concerns: Oxidizes upon air exposure to compounds that can cause skin sensitization.

Notes: Naturally found in citrus peels; commonly declared on allergen labeling lists.

🧪 Hexyl Salicylate / 水杨酸己酯

Purpose: Fragrance component imparting green, floral, and herbal notes with fixative qualities.

Notes: Provides substantive botanical fresh notes that withstand rinsing.

🧪 2,4-Dimethyl-3-Cyclohexene Carboxaldehyde / 2,4-二甲基-3-环己烯基甲醛

Purpose: Synthetic fragrance compound imparting strong, fresh green leaf and citrus notes.

Notes: Known in the trade as Triplal or Ligustral; highly effective top note.

🧪 Orange Extract / 甜橙提取物

Purpose: Natural botanical extract contributing authentic citrus aroma and mild degreasing assistance.

Notes: Contains natural terpene fractions that boost top-note freshness.

🧪 Hexahydro-Methanoindenyl Propionate / 丙酸三环癸烯酯

Purpose: Fragrance compound giving fruity, green, herbal, and woody notes.

Notes: Also known as Verdyl Propionate; provides long-lasting base freshness.

🧪 Linalool / 芳樟醇

Purpose: Fragrance ingredient providing a fresh, clean, floral-citrus scent.

Concerns: Can oxidize over time to form contact allergens.

Notes: Naturally occurring terpene alcohol found in lavender, bergamot, and coriander.

🧪 Butylphenyl Methylpropional / 丁苯基甲基丙醛 (铃兰醛)

Purpose: Synthetic floral fragrance ingredient mimicking lily-of-the-valley.

Concerns: Banned in cosmetic and consumer products in the EU/UK due to reproductive toxicity concerns.

Notes: Traditionally a flagship laundry fragrance compound, commonly known as Lilial.

🧪 Methyl Decenol / 甲基癸烯醇 (新铃兰醇)

Purpose: Fragrance ingredient providing clean, aldehydic, fresh laundry-ozone, and floral notes.

Notes: Commonly known as Precyclemone B, noted for conferring outdoors/line-dried freshness.

🧪 2-t-Butylcyclohexyl Acetate / 乙酸邻叔丁基环己酯 (绿叶酯)

Purpose: Aroma compound providing sweet, fruity, apple, and woody-camphorous notes.

Notes: Known commercially as Verdox or Agrumex; extremely stable against alkaline hydrolysis.

🧪 Guaiene / 愈创木烯

Purpose: Natural sesquiterpene fragrance constituent imparting warm, woody, and spicy undertones.

Notes: Naturally present in patchouli oil and guaiacwood extract.

🧪 Coumarin / 香豆素

Purpose: Fragrance ingredient delivering a sweet, warm, vanilla-like and freshly mown hay aroma.

Concerns: Known fragrance allergen requiring disclosure above threshold limits.

Notes: Classic fougère fragrance component with strong fabric substantivity.

🧪 Methyl Beta-Naphthyl Ether / 甲基-β-萘基醚 (橙花素)

Purpose: Potent fragrance fixative compound imparting intense sweet orange blossom and acacia notes.

Notes: Also known as Yara Yara; exhibits high chemical stability in detergents.

🧪 Methylcyclohexenylpropyl-Cyclopentanone / 甲基环己烯基丙基环戊酮

Purpose: Aroma compound delivering soft, lactonic, fruity-apricot, and velvety musk nuances.

Notes: Specialty macro-cyclic fragrance captive component enhancing fragrance longevity.

🧪 Pogostemon Cablin (Patchouli) Oil / 广藿香油

Purpose: Natural essential oil acting as a rich earthy-woody fragrance base note and fixative.

Notes: Provides tenacity and depth, anchoring volatile floral and citrus notes to washed fabrics.